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From "Scott Davis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (NET-282) Improvement to isInRange method in SubnetUtil.SubnetInfo class
Date Mon, 15 Jun 2009 21:44:07 GMT

     [ https://issues.apache.org/jira/browse/NET-282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Scott Davis updated NET-282:
----------------------------

    Priority: Minor  (was: Major)

Updated criticality to be minor.  An oversight on initial add.

> Improvement to isInRange method in SubnetUtil.SubnetInfo class
> --------------------------------------------------------------
>
>                 Key: NET-282
>                 URL: https://issues.apache.org/jira/browse/NET-282
>             Project: Commons Net
>          Issue Type: Improvement
>    Affects Versions: 2.0
>         Environment: All
>            Reporter: Scott Davis
>            Priority: Minor
>
> I am very pleased to see that the isInRange bug has been corrected in 2.1.  I would like
to suggest the additional change to the isInRange method (or perhaps some polymorphism).
> Current:
> private boolean isInRange(int address)      { return ((address-low()) <= (high()-low()));
}
> Proposed Fix (I saw in another bug ticket):
> {code}
> private boolean isInRange(int address) {
>     int normal = address - this.low;
>     return (normal >= 0 && normal <= (this.high - this.low))
> }
> {code}
> I would argue that the network address and the broadcast address, while not viable IPs
to be assigned, are still technically in the range of the network, so I would request that
the method be updated as follows (or perhaps a new method or flag you could pass to determine
if you want to include the network and broadcast address):
> {code}
> private boolean isInRange(int address) {
>     int normal = address - this.network;
>     return (normal >= 0 && normal <= (this.broadcast - this.network))
> }
> {code}
> Polymorphism route:
> {code}
> private boolean isInRange(int address) {
>     return isInRange(address, false);
> }
> private boolean isInRange(int address, boolean fullRange) {
>     int myLow;
>     int myHigh;
>     if (fullRange) {
>         myLow = this.network;
>         myHigh = this.broadast;
>     }
>     else {
>         myLow = this.low;
>         myHigh = this.high;
>     }
>     int normal = address - myLow;
>     return (normal >= 0 && normal <= (myHigh - myLow));
> }
> {code}

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